Looking for novel with everyone mistaken about protagonist identities and that mistaken though make the story flow not something like fake and true daughter/son but something like mistaken as monsterous genius actor, I'm not Demon God lackey, whered my delicate little wife go, mistakenly save the villain and so on.
Lord of the Mysteries: premise below, not bl, could be bl if you read AO3, ridiculously long (I love it) Spoiler: small spoiler everyone mistakes mc as a god in the beginning and mc lets it flow because it benefits him Spoiler: big spoiler although it eventually becomes real Players think I'm the Demon God: same premise as the above but bl, relatively short